本文实例讲述了php计算给定时间之前的函数用法。分享给大家供大家参考。具体如下：
这里给定一个时间，计算这个时间在多久前，比如：2天前，1年前
<?phpfunction prettydate($date){ $time = strtotime($date); $now = time(); $ago = $now - $time; if($ago < 60){ $when = round($ago); $s = ($when == 1)?second:seconds; return $when $s ago; }elseif($ago = 3600 && $ago = 86400 && $ago = 2629743.83 && $ago < 31556926){ $when = round($ago / 60 / 60 / 24 / 30.4375); $m = ($when == 1)?month:months; return $when $m ago; }else{ $when = round($ago / 60 / 60 / 24 / 365); $y = ($when == 1)?year:years; return $when $y ago; }}echo prettydate(2012-07-22 12:23:45).
;echo prettydate(2010-11-12 22:25:45).
;echo prettydate(2012-01-01 01:00:00).
;echo prettydate(2001-05-30 00:00:00).
;
希望本文所述对大家的php程序设计有所帮助。